Concrete-mixer.



R. C. HEATH.

CONCRETE MIXER.

APPLICATION FILED MAY 27, 1915.

Patented Oct. 31, 1916.

2 SHEETSSHEET I.

Witriesses Inventor,

Attorneys,

4 Kiwi/1AM.

R. C. HEATH.

CONCRETE MIXER.

APPLICATION FILED MAY 21. 1915.

Patented Oct 31,1916

2 SHEETSSHEET 2 g R w a a Illllllllllllllllll I t w v m H l n m J m @Mwmw KN m M i 0 L n e V n Witnesses A I r Attorneys,

cm PH ROBERT C. HEATH, 0F SUMNER, ILLINOIS.

CONCRETE-MIXER.

Application filed May 27, 1915.

To all whom it may concern:

Be it known that 1, ROBERT C. HEATH, a citizen of the United States,residing at Sumner, in the county of Lawrence and State of Illinois,have invented a new and useful Concrete-Mixer, of'which the following isa specification.

The'pre'sent invention appertains to concrete'mixers, and aims toprovide a novel and improved appliance of that nature.

The invention has for its object the pro- Vision of a concrete mixeremploying elevators' or conveyers for carrying the sand, gravel andcement upwardly from their respective bins and discharging the same intoa mixing device, whereby the laborious'operation of shoveling orotherwise manually introducing the sand, gravel and cement into thedevice is eliminated.

Another object of the invention is the provision of a' concrete mixerhaving a mixing device of uniqueconstruction, whereby it will bethoroughly convenient and eflicient in use.

It is also within the scope of the invention to provide a concrete mixerhaving the features above noted, and which at the same time, iscomparatively simple and inexpensive in construction, as well as beingpractical, convenient, labor-saving and efficient in use. I

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is laimed, without departing from the spirit of theinvention. The invention has been illustrated in the accompanyingdrawings, wherein Figure 1 is a plan view of the improved concretemixer. Fig.2 is a side elevation thereof, portions being broken away andshown in section. Fig. 3 is a longitudinal section taken on the line 3-3of Fig. 1. Fig. 4 is a cross section taken on the line 44 of Fig. 2.

In carryin out the invention, there is provided a suitable frame 1,preferably cone Specification of Letters Patent.

Patented oct. 31, 1916.

Serial No. 30,785.

structed of metal throughout, and carrying a mixing device at one end.This mixing device includes a transverse concave 2. carr1ed by one endof the frame 1 and extending through an arc ofover 180 degrees. Theforward or outer side ofthe concave 2 is relatively low, while the rearor inner side thereof is relatively high, as will be seen by referenceto .Fig. 3, and the concave 2'is provided with ends 3 which are cut awayor recessed, as at 4, between the edges of the concave. The ends 3 ofthe/ concave are provided with half bearings 5 at the crotch or cornerportions of the recesses 4.

An arcuate section 6 has its lower end hinged, as at 7, to the frontside of the concave 2 and projects upwardly toward the rear upper edgeof the concave to cooperate with the concave for providing the mixingcasing. The section (ihasthe sector-shaped ends 8 adapted to fitv withinthe recesses 4 of the ends 8 of the concave, for completing the ends ofthe casing, and the forward edge of the concave 2 projects upwardlyabove the hinge 7, asat 9, to overlap the hinged edge of the section 6within said section. The upper or free edge of the section 6. has aninclined flange 10 which provides av hopper mouth for the casing todirect the sand, gravel and concrete properly into the casing, areceiving opening or mouth 11 being provided between the upper edges ofthe concave 2 and section 6. The ends 8 of, the section 6 are proyidedwith halfbearings' 12 normally cooperating, with the half-bearings 5. v

Mounted for rotation within the mixing casing is a mixing cylinder ordrum 13 having a spiral, series of outstanding peripheral teeth 14arranged to work close adjacent the concave 2 and section 6 constitutingthe casing. The ends of the cylinder 13 have trunnions 15 and 16 whichare journaled between the half-bearings 5 and 12, the trunnions beingseated in'thehalfbearings 5sand being held therein by the half-bearings12.

The other or rear end of the frame 1 is equipped with a transverseseries of spaced bins or receptaclesl? into-which the sand, gravel andcement may be shoveled or dumped readily, without the necessity ofraising the same to an excessive height. The frame 1 also carrieslongitudinal inclined trunks'flS forthe elevators or conveyers, and thelower or rear ends of the trunks 18 are disposed within the bins 17,while the upper ends of the trunks overhang the mixing casing. The lowerand upper ends of the trunks 18 are provided with the openings 19 and20. A drum or sprocket wheel 21 is mounted within the lower end of eachtrunk 18 and a similar drum or sprocket. wheel 22 is mounted within theupper end of each trunk. The drums 22 are keyed upon a common transverseshaft 23 which is journaled upon the frame in any suitable manner, andthe drums 21 of the side trunks are keyed upon a common transverse shaft24 journaled to the frame, while the drum 21 of the central orintermediate trunk is carried by an independent transverse shaft 25journaled to the frame. The lower end of the central or intermediatetrunk is raised or spaced above the horizontal plane of the lower endsof the side trunks. Endless belts 26 are passed around the drums 21 and22 of the respective pairs, and within the respective trunks. andbuckets 27 are carried by the belts 26.

The cylinder 13 and belts 26 are actuated simultaneously, and to thisend, a spur gear 28 is keyed upon the trunnion 16 and meshes with a spurgear 29 keyed upon one end of the shaft 23. The shaft 24pis preferablyrotated with the shaft 23, and to this end, sprocket Wheels 30 and 31are keyed upon the shafts 23 and 24 respectively, and an endlesssprocketchain 32 is passed around said sprocket wheels.

The section 6 of the mixing casing is held in closed position by meansof hooks or latches 33 carried by the ends 8 of the section 6 andengaging keepers 34 carried by the ends 3 of the concave 2. One end ofthe concave is provided with a lower outlet 35 for the concrete orgrout.

The machine is preferably driven by a belt applied to a pulley wheel 86carried by the trunnion. 16, although it is to be understood that themixer may be driven in any suitable manner. 7

In operation, the sand, gravel and cementis shoveled or is dumped intothe bins 17 in any convenient manner, and the elevator belts 26 beingoperated will rial upwardly therewith, since the upper runs of the beltsmove upwardly toward the mixing device so that the buckets 27 will carrythe material therewith. The openings 19 at the lower ends of the trunks18 allow the material to flow into the lower ends of the trunks so thatthe buckets will take up the material, and when the buckets reach theupper ends of the trunks, the material will be discharged therefromthrough the carry the mate-- openings 20 so as to drop through theopening or mouth 11 of the mixing casing into said casing. The flangelO'serves to: direct the material into the mixing casing, to pre ventspilling, and the cylinder 13 being r0 tated within the mixing casingWill thoroughly agitate and admix the sand, gravel and cement. Theconcrete will flow out through the outlet or discharge spout 35, thisbeing facilitated due to the spiral arrangement of the fingers lt whichtend to Work the material toward the discharge spout 85, as well asagitating and mixing the material. The elevator belts 26 and theirbuckets 27 Y are preferably of different sizes according to theproportions of sand, gravel and cement desired in the present mechanism,the material is elevated and discharged into the mixing device in aneflicient and" convenient manner, and

eliminates the laborious operation of manu ally shoveling or otherwiseintroducing the material into the mixing casing.

When it is desired to clean, examine or prepare the mixing device,- thesection 6 may; be readily-swung out of the way, by disengaging the hooks33 from the keepers 34, so that the section 6 can be swung f0rwardly anddownwardly. the cylinder13 and the a cave 2,.and the cylinder .13 may bereadily lifted out of the concave, if desired, since the trunnions ofthe cylinder can be lifted out of the half-bearings 5.

7 It will be noted that the trunks are spaced apart between the binsthata shield extends trunks and above them 7 close to the bins, thisshield being indicated at 18'. Thus any and the concaveand" transverselyof the This Will expose interior of the conmaterial such as trash or thelike falling on i the trunks will be prevented by the shield fromfalling into the bins and will, instead,

spaces bedrop downwardly tween the trunks.

From the foregoing, taken in connection with. the drawings, theadvantages and attributes of, the present invention will be ob vious tothose versed in the art, without furthercomment being deemed necessary.

Having thus described the invention, what is claimed as new is In adevice of the class described, a frame comprising side plates; a concaveconnect-- ing the side plates, the concave including ends forming partsof the side plates, the ends of the concave being provided with throughthe rectangular notches at theangles of which,

bearings are formed, the concave extending transversely through. an arcof more than 180 degrees, the forward side ofthe concave being lowerthan the rear side thereof; an

arcuate section having its lower end hinged to the forward side oftheconcave and projecting upwardly toward the rear side of the concaveto form a mixing casing, the arcuate section having sector-shaped endsfitting in the notches of the ends of the'con cave and provided withbearings cooperating with those of the ends of the concave, the forwardedge of the concave projecting upwardly above the hinged mounting of thearcuate section, the upper edge of the armate section having an inclinedflange form- 10 ing a hopper-mouth for the casing; and a mixing memberjournaled for rotation in the bearings.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy slgnature in the presence of two witnesses.

ROBERT C. HEATH.

Witnesses:

O. A. FYFFE, J. W. VANGILDER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

